Do exterior walls have to be exactly centered on the strip foundation?

Hello, since I am new with you, I am unfortunately not sure if the question is correctly placed here, but I will just try my luck.

We are currently waiting for a prefabricated house, for which we are doing the basement and floor slab ourselves, or with companies other than the house supplier.

Now I have a question about the foundations and the walls that will be on them later. I have seen some pictures on the internet where the basement walls sit exactly in the middle of the strip foundation, so that there is an overhanging edge all around. With a 50cm wide foundation and a 24cm basement wall, the outer overhanging foundation edge is thus 13cm. Our earthworker has now prepared the formwork of the foundations so that the basement walls will later finish exactly at the foundation. So I have a 50cm wide strip foundation where the basement walls with 24cm will sit directly on the outer edge and the other 26cm of the foundation lie virtually inside the house. Since the foundation and floor slab are reinforced and poured quite extensively together, there should be no danger of tipping, cracking, or similar. The surrounding foundation is 50cm wide and accordingly deep; in the middle, there are also deeper foundation strips under the load-bearing walls, which are arranged centrally under the wall, and the rest of the floor slab is about 15 cm thick.

Can this be done like this, or what is your opinion?

Of course, I know that this is best calculated by a structural engineer, but before I give him a paid order, I wanted to generally ask the question of how it is "usual" in construction.

I hope you can help me or bring some clarity.

Hello

letting the foundation stick out would only make sense if facing bricks are going on it.

Steven

The structural analysis must tell you that. If you have serious concerns, hire an expert.

The later basement walls are embedded on 3 sides in the ground, so here no clinker is applied, only external insulation. I actually just want to know whether there are general guidelines for strip foundations, or not. For pure slab foundations without a basement, I know that for this prefabricated house manufacturer they usually do not have an overhang, but rather align flush with the exterior wall. For foundations for, for example, freestanding garden walls, a central placement with overhang on the right/left naturally also makes sense, but how is it with the construction I have described?

Hello

letting the foundation protrude would only make sense if clinker bricks are going on it.

Steven

That is not the case – as far as I know, the slab protrudes, with a cove, and then the insulation is applied.

It was the same with me, part of a wall is exposed, but not all the way down. Why strip foundations? Or is the slab, so to speak, completely exposed on one side, like a sloped plot?

It is a hillside property and on one side it is completely open, where we also drive into the garage. On the other 3 sides, the basement wall is in the ground.